In Act 3 of Expedition 33, here is what you should do:

• First, go to the Endless Tower located in the southwest and complete the first two trials there. You can attempt the third trial but it is very challenging

• Upon arriving at Act 3, you will be at camp. Talk to every party member and watch all their bond events to increase bond levels. This unlocks powerful Gradiant attacks and exclusive dungeons and bosses marked on your map. Key dungeons include The Reacher (unlocked by maxing bond with Maelle), The Flying Manor (near Endless Tower), and Renior’s Drafts (near Axon Islands, unlocked by maxing bond with Esquie)

• Explore new areas unlocked by Esquie's flying ability, such as The Fountain, Flying Casino, Siréne's Dress, Sacred River, and The Reacher. The Fountain is near Spring Meadows and contains a tough Nevron whose behavior depends on your previous choices with Nevrons

• Complete side quests like Maelle’s quest by speaking to her at camp to gain access to The Reacher, where enemies are easier to dodge and parry

• Engage in optional activities like Gestral Beaches (platforming or minigames) and defeating Mimes in dungeons to earn costumes and hairstyles

• When ready to finish the story, fly to Lumiere and enter the final dungeon. You can leave Lumiere after entering if you want to explore more before the ending

This sequence prepares you for the endgame by maximizing your party's power and exploring all content before the final dungeon